为了 向上滑动背景色, 您需要使用背景图片或某种渐变,同时逐步调整background-position
:
.@R_617_2419@ {
width: 200px; height: 100px;
background-size: 100% 200%;
background-image: linear-gradient(to bottom, red 50%, black 50%);
transition: background-position 1s;
}
.@R_617_2419@:hover {
background-position: 0 -100%;
}